Optimization Studies on Recovery of Metals from Printed Circuit Board Waste

Table 11

Model terms in RSM for copper.

Term	Standard error	VIF	Ri^2	Power (%)
A	0.3536	1	0.0000	69.8
B	0.3536	1	0.0000	69.8
C	0.3536	1	0.0000	69.8
AB	0.5000	1	0.0000	42.1
AC	0.5000	1	0.0000	42.1
BC	0.5000	1	0.0000	42.1
A^2	0.4787	1.01852	0.0182	95.4
B^2	0.4787	1.01852	0.0182	95.4
C^2	0.4787	1.01852	0.0182	95.4